New and Changed Information

The Cisco Unified SIP Phone 3951 is a cost-effective entry-level phone for use in a lobby, laboratory, manufacturing floor, or hallway. This phone belongs to the family of Cisco Unified IP Phones, running Session Initiation Protocol (SIP) on Cisco Unified CallManager but differs from other Cisco Unified Phones as follows:

• You must configure a SIP dial plan for the Cisco Unified SIP Phone 3951, as it does not use KeyPad Markup Language (KPML).

• You must configure the system to support Dual-Tone Multifrequency (DTMF) by either configuring Media Termination Point (MTP) on a transcoding device that supports RFC 2833 or by checking the Require DTMF Reception check box for each registered Cisco Unified SIP Phone 3951 in Cisco Unified CallManager Administration.

• Cisco Unified CallManager resources are not used for conference calls.

• Speed dials and call forwarding information are managed and stored on the phone itself and not in Cisco Unified CallManager.

•The Personal Address Book and Fast Dials features are not supported on the phone, even when configured on the Cisco Unified CallManager User Options web page.

Open Caveats

For more information about an individual defect, you can access the online record for the defect by clicking the Identifier or going to the URL shown. You must be a registered Cisco.com user to access this online information.

Because defect status continually changes, be aware that Table 1 reflects a snapshot of the defects that were open at the time this report was compiled. For an updated view of open defects, access Bug Toolkit as described in the "Using Bug Toolkit" section.

Resolved Caveats

There are no resolved caveats for Cisco Unified SIP Phone 3951 for firmware release 8.0.

Obtaining Documentation, Obtaining Support, and Security Guidelines

For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

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Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.